Cn1cc(O)nc1N mol12431 0_1 Cn1cc([O-])nc1[NH3+] mol12431 0_2 Cn1cc(O)nc1[NH3+] mol12431 1_1 Cn1cc(O)[nH+]c1N mol12431 1_2 Cn1cc([O-])nc1N mol12431 -1_1